World Timezones

KST to JST Converter

Compare JST to KST instead
Korea Standard Time1:36 pmFri, Jun 5
Korea Standard TimeKST
Asia · UTC+9
1:36 pmFri, Jun 5
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
Japan Standard TimeJST
Asia · UTC+9
1:36 pmFri, Jun 5
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p

Offset

There is no time difference between Korea Standard Time and Japan Standard Time.

Same time

Korea Standard Time (KST) is currently the same time as Japan Standard Time (JST).

KST: UTC+9

JST: UTC+9

Neither Korea Standard Time nor Japan Standard Time is currently observing daylight saving time.

When to schedule

Business-hours overlap: 9 AM–5 PM in Korea Standard Time (9 AM–5 PM in Japan Standard Time).

Both teams are in working hours during this window on weekdays.

Suggested time: 1:00 PM Korea Standard Time (1:00 PM Japan Standard Time).

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

South Korea

  • New Year's DayThu, Jan 1
  • Lunar New YearMon, Feb 16
  • Lunar New YearTue, Feb 17
  • Lunar New YearWed, Feb 18
  • Independence Movement DayMon, Mar 2
  • Labour DayFri, May 1
  • Children's DayTue, May 5
  • Buddha's BirthdayMon, May 25
  • Local Election DayWed, Jun 3
  • Memorial DaySat, Jun 6
  • Constitution DayFri, Jul 17
  • Liberation DayMon, Aug 17
  • ChuseokThu, Sep 24
  • ChuseokFri, Sep 25
  • ChuseokSat, Sep 26
  • National Foundation DayMon, Oct 5
  • Hangul DayFri, Oct 9
  • Christmas DayFri, Dec 25

Japan

  • New Year's DayThu, Jan 1
  • Coming of Age DayMon, Jan 12
  • Foundation DayWed, Feb 11
  • The Emperor's BirthdayMon, Feb 23
  • Vernal Equinox DayFri, Mar 20
  • Shōwa DayWed, Apr 29
  • Constitution Memorial DayWed, May 6
  • Greenery DayMon, May 4
  • Children's DayTue, May 5
  • Marine DayMon, Jul 20
  • Mountain DayTue, Aug 11
  • Respect for the Aged DayMon, Sep 21
  • Autumnal Equinox DayWed, Sep 23
  • Sports DayMon, Oct 12
  • Culture DayTue, Nov 3
  • Labour Thanksgiving DayMon, Nov 23

About these zones

Korea Standard Time is also known as KST. To call South Korea, dial +82.

Japan Standard Time is also known as JST. To call Japan, dial +81.

Japan Standard Time is approximately 725 miles east of Korea Standard Time.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

KSTJSTDay
12:00 am12:00 amSame day
1:00 am1:00 amSame day
2:00 am2:00 amSame day
3:00 am3:00 amSame day
4:00 am4:00 amSame day
5:00 am5:00 amSame day
6:00 am6:00 amSame day
7:00 am7:00 amSame day
8:00 am8:00 amSame day
9:00 am9:00 amSame day
10:00 am10:00 amSame day
11:00 am11:00 amSame day
12:00 pm12:00 pmSame day
1:00 pm1:00 pmSame day
2:00 pm2:00 pmSame day
3:00 pm3:00 pmSame day
4:00 pm4:00 pmSame day
5:00 pm5:00 pmSame day
6:00 pm6:00 pmSame day
7:00 pm7:00 pmSame day
8:00 pm8:00 pmSame day
9:00 pm9:00 pmSame day
10:00 pm10:00 pmSame day
11:00 pm11:00 pmSame day

Daylight saving time

Neither Korea Standard Time nor Japan Standard Time observes daylight saving time. The offset between these zones remains constant year-round.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Korea Standard Time
Sunrise
5:12 AM
Sunset
7:51 PM
Day length
14h 38m
Japan Standard Time
Sunrise
4:27 AM
Sunset
6:55 PM
Day length
14h 28m

Daylight overlap: 13h 42m — 5:12 AM–6:55 PM in Korea Standard Time (5:12 AM–6:55 PM in Japan Standard Time). Both locations are in daylight during this window.

Cities in these zones

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Korea Standard Time

  • GMP
  • ICN
  • PUS
  • TAE
  • CJJ
  • KWJ
  • MWX

Airports in Japan Standard Time

  • HND
  • NRT
  • ITM
  • KIX
  • UKB
  • NGO
  • NKM
  • CTS
  • OKD
  • FUK

Related conversions

Common conversions

What is 9:00 am KST in JST?
9:00 am KST is 9:00 am JST.
What is 12:00 pm KST in JST?
12:00 pm KST is 12:00 pm JST.
What is 12:30 pm KST in JST?
12:30 pm KST is 12:30 pm JST.
What is 2:00 pm KST in JST?
2:00 pm KST is 2:00 pm JST.
What is 5:00 pm KST in JST?
5:00 pm KST is 5:00 pm JST.
What is 11:30 pm KST in JST?
11:30 pm KST is 11:30 pm JST.